Abstract
The Birnies were not united in a wedding ceremony, but they were a common law married couple. According to her therapist he controlled her and she was an unwilling accomplice in the murders, mutilations and rapes. In this chapter the two killers were described in detail, as was their relationship. Their other crimes were discussed, and the killings themselves were analyzed in terms of MO, motive, time frame, victims, victimology and number of victims. Significant serial killer communication was discovered and explained, and the investigation and trial discussed.
Keywords: Abduction, Australia, Catherine Birnie, David Birnie, Common law marriage, Domestic help, Glen Eagle National Park, House of horrors, Karnet Prison, Love nest, Natural born killer, Perth, Perth Police Court, Pinnaroo Cemetery, Serial killer couples, Sodomy, Squalor, Torture chamber, Victoria Park, Waverly Drive-In Theater.